Ranjivosti programskog paketa openssl

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Red Hat Security Advisory

Synopsis: Moderate: openssl security update
Advisory ID: RHSA-2015:1197-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-1197.html
Issue date: 2015-06-30
CVE Names: CVE-2015-1789 CVE-2015-1790 CVE-2015-4000
=====================================================================

1. Summary:

Updated openssl packages that fix three security issues are now available
for Red Hat Enterprise Linux 5.

Red Hat Product Security has rated this update as having Moderate security
impact. Common Vulnerability Scoring System (CVSS) base scores, which give
detailed severity ratings, are available for each vulnerability from the
CVE links in the References section.

2. Relevant releases/architectures:

RHEL Desktop Workstation (v. 5 client) – i386, x86_64
Red Hat Enterprise Linux (v. 5 server) – i386, ia64, ppc, s390x, x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) – i386, x86_64

3. Description:

OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL v2/v3)
and Transport Layer Security (TLS v1) protocols, as well as a
full-strength, general purpose cryptography library.

An out-of-bounds read flaw was found in the X509_cmp_time() function of
OpenSSL. A specially crafted X.509 certificate or a Certificate Revocation
List (CRL) could possibly cause a TLS/SSL server or client using OpenSSL
to crash. (CVE-2015-1789)

A NULL pointer dereference was found in the way OpenSSL handled certain
PKCS#7 inputs. A specially crafted PKCS#7 input with missing
EncryptedContent data could cause an application using OpenSSL to crash.
(CVE-2015-1790)

A flaw was found in the way the TLS protocol composes the Diffie-Hellman
(DH) key exchange. A man-in-the-middle attacker could use this flaw to
force the use of weak 512 bit export-grade keys during the key exchange,
allowing them to decrypt all traffic. (CVE-2015-4000)

Note: This update forces the TLS/SSL client implementation in OpenSSL to
reject DH key sizes below 768 bits, which prevents sessions to be
downgraded to export-grade keys. Future updates may raise this limit to
1024 bits.

Red Hat would like to thank the OpenSSL project for reporting CVE-2015-1789
and CVE-2015-1790. Upstream acknowledges Robert Swiecki and Hanno Böck as
the original reporters of CVE-2015-1789, and Michal Zalewski as the
original reporter of CVE-2015-1790.

All openssl users are advised to upgrade to these updated packages, which
contain backported patches to correct these issues. For the update to take
effect, all services linked to the OpenSSL library must be restarted, or
the system rebooted.

4. Solution:

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

5. Bugs fixed (https://bugzilla.redhat.com/):

1223211 – CVE-2015-4000 LOGJAM: TLS connections which support export grade DHE key-exchange are vulnerable to MITM attacks
1228603 – CVE-2015-1789 OpenSSL: out-of-bounds read in X509_cmp_time
1228604 – CVE-2015-1790 OpenSSL: PKCS7 crash with missing EnvelopedContent

6. Package List:

Red Hat Enterprise Linux Desktop (v. 5 client):

Source:
openssl-0.9.8e-36.el5_11.src.rpm

i386:
openssl-0.9.8e-36.el5_11.i386.rpm
openssl-0.9.8e-36.el5_11.i686.rpm
openssl-debuginfo-0.9.8e-36.el5_11.i386.rpm
openssl-debuginfo-0.9.8e-36.el5_11.i686.rpm
openssl-perl-0.9.8e-36.el5_11.i386.rpm

x86_64:
openssl-0.9.8e-36.el5_11.i686.rpm
openssl-0.9.8e-36.el5_11.x86_64.rpm
openssl-debuginfo-0.9.8e-36.el5_11.i686.rpm
openssl-debuginfo-0.9.8e-36.el5_11.x86_64.rpm
openssl-perl-0.9.8e-36.el5_11.x86_64.rpm

RHEL Desktop Workstation (v. 5 client):

Source:
openssl-0.9.8e-36.el5_11.src.rpm

i386:
openssl-debuginfo-0.9.8e-36.el5_11.i386.rpm
openssl-devel-0.9.8e-36.el5_11.i386.rpm

x86_64:
openssl-debuginfo-0.9.8e-36.el5_11.i386.rpm
openssl-debuginfo-0.9.8e-36.el5_11.x86_64.rpm
openssl-devel-0.9.8e-36.el5_11.i386.rpm
openssl-devel-0.9.8e-36.el5_11.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:
openssl-0.9.8e-36.el5_11.src.rpm

ia64:
openssl-0.9.8e-36.el5_11.i686.rpm
openssl-0.9.8e-36.el5_11.ia64.rpm
openssl-debuginfo-0.9.8e-36.el5_11.i686.rpm
openssl-debuginfo-0.9.8e-36.el5_11.ia64.rpm
openssl-devel-0.9.8e-36.el5_11.ia64.rpm
openssl-perl-0.9.8e-36.el5_11.ia64.rpm

ppc:
openssl-0.9.8e-36.el5_11.ppc.rpm
openssl-0.9.8e-36.el5_11.ppc64.rpm
openssl-debuginfo-0.9.8e-36.el5_11.ppc.rpm
openssl-debuginfo-0.9.8e-36.el5_11.ppc64.rpm
openssl-devel-0.9.8e-36.el5_11.ppc.rpm
openssl-devel-0.9.8e-36.el5_11.ppc64.rpm
openssl-perl-0.9.8e-36.el5_11.ppc.rpm

s390x:
openssl-0.9.8e-36.el5_11.s390.rpm
openssl-0.9.8e-36.el5_11.s390x.rpm
openssl-debuginfo-0.9.8e-36.el5_11.s390.rpm
openssl-debuginfo-0.9.8e-36.el5_11.s390x.rpm
openssl-devel-0.9.8e-36.el5_11.s390.rpm
openssl-devel-0.9.8e-36.el5_11.s390x.rpm
openssl-perl-0.9.8e-36.el5_11.s390x.rpm

x86_64:
openssl-0.9.8e-36.el5_11.i686.rpm
openssl-0.9.8e-36.el5_11.x86_64.rpm
openssl-debuginfo-0.9.8e-36.el5_11.i386.rpm
openssl-debuginfo-0.9.8e-36.el5_11.i686.rpm
openssl-debuginfo-0.9.8e-36.el5_11.x86_64.rpm
openssl-devel-0.9.8e-36.el5_11.i386.rpm
openssl-devel-0.9.8e-36.el5_11.x86_64.rpm
openssl-perl-0.9.8e-36.el5_11.x86_64.rpm

These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2015-1789
https://access.redhat.com/security/cve/CVE-2015-1790
https://access.redhat.com/security/cve/CVE-2015-4000
https://access.redhat.com/security/updates/classification/#moderate
https://www.openssl.org/news/secadv_20150611.txt

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

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